>>/174677/,  >>/174768/
Yes, Rapid Response anti-ICE efforts in Seattle operate using Signal.
The Washington Immigrant Solidarity Network (WAISN) runs the state’s Rapid Response program, which relies on Signal chat groups to coordinate volunteers.  Residents who join a team are assigned to a specific geographic area and communicate through these encrypted Signal chats to respond quickly to ICE sightings. When a sighting is reported—via a hotline (1-844-RAID-REP) or direct alert—information is relayed to the closest Signal group for immediate action. 
These teams are trained to document raids, protect individuals’ rights, and ensure safety through coordinated presence, often using tools like whistles and real-time vehicle tracking. The system is part of a broader network that includes neighborhood-based chats, data collection, and rapid mobilization, all designed to deter ICE operations and protect immigrant communities. 
AI-generated answer.

https://crimethinc.com/2026/01/15/rapid-response-networks-in-the-twin-cities-a-guide-to-an-updated-model
https://myedmondsnews.com/2026/01/local-residents-join-rapid-response-teams-to-document-local-ice-raids/
https://www.reddit.com/r/Minneapolis/comments/1qiry1t/reporting_ice_when_youre_out_of_your_own_signal/
https://www.codepink.org/latam_ice

What are the training requirements for Rapid Response volunteers?
Rapid Response volunteers in Seattle must complete a training session provided by the Washington Immigrant Solidarity Network (WAISN). 
The training covers:
How to safely respond to ICE activity
Proper documentation and reporting procedures
Roles at the scene, including de-escalation and legal basics
How to support impacted individuals and plug into the WAISN network 
No prior experience is required. Trainings are typically 2 hours long and offered virtually or in person. Volunteers are trained to observe and document without interfering with law enforcement. 
https://ufcw3000.org/events/2025/2/5/waisn-training-rapid-response
https://waisn.org/what-we-do/org-membership/
https://waisn.org/event/rapid-response-training-march-2026/
https://www.westseattleindivisible.com/events-actions/rapid-response-training-waisn-2dsxx
https://scptsa.org/upcoming-events/2026/3/6/waisn
https://www.soswhidbey.org/events/waisn-rapid-response-training
https://www.mobilize.us/mobilize/event/653245/